Valve



Jan. 27,O 1931'.

\ Filed March l0, 19,30

. INVENTOR ,r/ y A/ E@ Patented Jan. 27, '-1 931 UNITED si'ii'rlezs` PATENT .oF-FICE `NILIFLS ATTERBURY, 0F PITTSBURGH, PENNSYLVANIA VALVE Application led March 10, 1930. Serial`No..434,533.

- in its action and comparatively inexpensive to manufacture and maintain.

With the foregoing and other objects iny view which will appear as' the description.l

proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention hereinafter disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing wherein like numerals of reference designate corresponding vparts throughout the several views Figure 1 is a vertical cross sectlonal view of a gate valve embodying the present invention. 'l

Figure 2 is a top plan view of the bonnet head. I Figure 3 is an end view of the dlsk gate and: of associated parts, `the latter being 1n crosssection and broken away. l

Referring in detail to the drawing 1 denotes a body portion or valve casing having flanged ends 2 and 3 for permitting the connection of the device in an associated conduit in the usual manner. The valve casin'g is provided with conduit passages 4 and y5 which extend through respective valve ends 2 and 3. The inner ends of the passages 4 and 5 communicate with the lower end of a vvalve chamber 6, which is formed in the cassages l3 and 4. The inner. faces 9 of the seat rings 7 and 8 are disposed angularly and are adapted for seating the disk gate 10, which is disposed therebetween. The disk gate l() 1s tapered to effect a wedging action when engaging the angularly disposed faces 9 .of the seat rings 7 and 8 to close the valve.

The disk gate 10 is provided with a pair of laterally disposed, grooved ears 1'1, whichv are engaged on respective guides 12 formed on the wall of the valve chamber 6 for Vmaintainingthe proper alignment of the disk gate 10 within the latter and between the seat rings7 and 8. l 7

The valve casing l includes a anged bonnet 11, which latter is mounted on the flanged top of the valve casing l and secured to the l latter by a plurality of bolts x12. 'A lower valve stem 13 is revolubly mounted in and extends through the center of the bonnet 11,

and has a lower.threaded portion 14, which y extends into the valve chamber 6 and threadedly engages in a'correspondingly threaded aperture 15 provided in a shank 15 formed integral with the top of the disk gate 10.

The upper end of the valve stem 13 is provided with an annular shoulder 16 having a tapered lower face 17. The' top of the bonnet 11 is formed with a recess 18 for the reception of the shoulder 16 .and includes a tapered seat 19, which is adapted vfor engagement by the tapered lower face 17 of the shoulder 16. The top of the shoulder 16 is exactly Hush with the 'top of the bonnet 11.

The upper end portion of the lower stem 10 is provided with a squared. shank 20 of an upper stem 23. The latter is provided with a ianged lower end 24, and is revolubly mounted on top of the bonnet 11. The upper stem 23 is sec `red to rotate on the top of the bonnet 11 by head 25. The latter overlaps the lower flanged end 24, and is secured in position on the top of the bonnet 11 by bolts 26.

The upper stem 23 is provided with a tapered upper end 27, a portion of which is inn threaded for the engagement of a nut 23 for lxedly securing a hand wheel 29 to the tapered end 27 of the upper stem 23.

lower stem 13. The upper end of the locking screw 30 projects beyond the top of the lower stem 23 and carries a fixed operating lever 32. f y f The disk gate 10 is provided with an aper- Ature 33, which communicates with the threaded aperture 15 formed in` the shank 15. The purpose of the aperture 33 is to provide clearance for the lower threaded portion 14 of the lower stem 13 when the disk-gate 10 is shifting to the open position in a manner hereinafter set forth.

A chamber 34 is formed in the bonnet 11 and communicablyjoins with .an aperture 35 which is closed by a-plug36. This arrangement is provided to permit the draining of condensations from the device and for lubricating the latter. i

The manipulation of thp hand wheel 29 will rotate the upper valve stem 23, and the latter will impart like rotation to the lower valve stem 13, owing to the connection of the squared shank 20 in the squared aperture 22. The rotation of the lower stem 13 will shift the disk gate 10 to open or close the device due to the threaded connection of the stem portion 14 in the disk gate shank 15.

The feature of the present invention/ifesides in the novel meansv for preventing leakage without the use of packing. This is effected by seating the lower face 17 of the shoulder 16 in the taperedy seat 19 of the recess 18. ""*When the disk gate 10 has been suitably adjustedto -the desired position in l the valve casing 1, by the manipulation of the hand wheel 29, the locking screw 30 is rotated, by the manipulation of the lever 32, for. forcibly seating the ,shoulder .face 17 against the recess seat 19. As the shoulder y16 normally has an accurate sliding lit in the recess 18, it will beobvious that but an infinitesimal movementjof the lower stem 13, by the action of tbe locking screw v30 in the manner stated will effect the proper seating of the shoulder face X17 against the recess seat 19- to render the latter impervious to leakage therethrough.

The present invention provides a most eiiicient Vdevice of its kind, which will func-n /acter descrlbed, comprlsing a casmg providing a valve chamber, said casing including a bonnet secured to said casing, a valve member mounted in said valve chamber, an inner stem revolubly mounted in said bonnet and threadedly'engaging said valve member for shifting the latter to the opening and closing positions, an outer valvestem connecting with said inner stem for actuating ythe latter, means for revolubly securing said outer stem to said bonnet, a shoulder carried by said inner stem, said bonnet being formed With a recessed seat seating said shoulder, and a locking screw threadedly mounted in said outer stem and engaging said inner stemfor forcing and maintaining said shoulder in saidI recessed scat for preventing leakage from said casing around said inner stem.

In testimony whereof I aihx my signature.

` NILES ATTERBURY.

maintaining said shoulder in said re- 

